Fan or blower.



Patente Nov. 13, 1917.

ERNST GLANTZBERQKOF NEVI YORK, N'. Y.

FAN OB, BLO'i/VER.

Specification of Letters Patent.

Patented N ov. 13, 1917.v

Application filed November 4, 1916. Serial No. 129,533.

To all trimm it may concern.'

Be it known that l, ERNST GLANTZBERG, a citizen of the United States of America, and resident of New York, in the county of New `York and State of New York, have invented certain new and useful improvements in Fans or Blowers, of which the following is a full, clear, and exact description.

This invention relates to improvements in the rotary portion of a fan, or blower, which comprises the central sliaft-ca ried body and radiating blades or wings, portions of which are deflected angular-ly to the plane of rotation.

The object of the invention is to provide a novel construction of fan blade wliicli,\vhile v light and cheaply produced, has the capability of withstanding theleverage'.strains or forces which would tend to bench-distort or break it at any portion of its length, and especially at its butt end portion or shank at or near its connection with its carrying body.

Another object of the invention is to provide an improved carrying body of built up or laminated and reinforced character which while extremely strong is also exceptionally light, and is also susceptible of cheap and rapid production.

And another object is to so form, and arrange or combine the parts composing the fan blades, and those composing the body that the saine fastenings employed to unite the parts of the bladesare in common to and imite the parts of the body, and also unite the blades and body to produce the forth in the claims.

ln the drawings lfigure l is a front view showing the body portion and indicating several of the blades of the fan. n

Fig. 2 is a sectional elevation as taken on line 2 2, Fig. l.

Fig. 3 is a plan and partial horizontal section as taken on line 3-3, Fig. l.

Y Fig. 4 is a perspective view showing the forni of cleat or spacing bar comprised in the construction of the fan blades.

Y In the drawings, A represents the fan carrying shaft, B the blade carrying fan body or center comprising the hub C, and D represents the blade.

Each blade comprises a suiciently long radiating -plate a. having a comparatively narrow edge portion Z2 which is oblique or angular in relation to the major portion d of the width of the plate. V f represents a cleat or spacing bar extend ing longitudinally of the plate a along the edge portion and at the butt or inner end portion thereof.

rthis spacing bar is taperedin its length as shown in Figs. 2 and si and it has its inner edge portion g obliquely or angularly` turned and alsocross sectionally tapered.

lThe blades include another plate /tconsiderably shorter than the plate a and of,A

less width than such plate, but, however, of a length greater than that of the spacing b ar; and this plate It is 'transversely obliquely or angularly shaped to conform to the cleat on the side thereof opposite the location of the first plate e.

.The plat-e i. is transversely extended inc'liningly toward, and has its marginal portion in contact on, the first plate and is secured by rivets i or other equivalentfastenings to such plate.

The plate it has its outer end portion beyond the spacing bar f extended at a slightz inclination to merge to contact on the fiat edgewise portion b of the platea, and is Secured by rivets 7' or equivalent fastenings thereto.

ri`he plate a is longitudinally corrugated to forni ribs 7c, and the plate L' has one or more ribs k2 struck up in the length thereof.

rThe edge portions of the plates a and o and the'interposed spacing bar f are firmly united by the rivets o and to which further reference will be had.

rThe fan body or center B is made up of alli plurality of centrally apertured thin metal disks or annuli o of successively increasing diameters, as particularly shown in Fig. 2 and in facewise adjoined relations, all having the central apertures therein of the same diameter to fit about the hub C, and the said` different sized disks have, all, at the same side thereof, angular-ly turned marginal flanges t t whereby each of the disks is ren. deredof a cup shape.

The disks p p,to form the laminated or built up center of the fan, which while light is extremely strong-are, as here shown, fastened one to the next by the saine rivets 0 o which unite the plates a and I) and the spacing bar 7 of the blades.

Thus, employing a minimum number of fastenings, the same rivets 0 form uniting means for the componentparts of the blade, form uniting means for the component parts of the thin metal built-up body B, and form also the means for uniting the blades and body The' hub C has a shoulder forming flange u against which the centrally apertured blade carrying body bears; and the body is secured tothe hub by bolts fu i which' pass through the body near the central aperture' While in the foregoing specification the fan has been described exactly as the same has been constructed and extensively used,

`it is possible, as manifest, to make departures in minor respects from the exact forms and constructions shown within the purview of my claims.

I claim :-V

1. In a rotary fan, a circular rotatable body, and outwardly extending blades secured thereto, each consisting of a radiating plate, a'cleatfor spacing bar extending longitudinally of the plate along one edge and at the butt end portionthereof, another plate extending along the cleat and transversely inclined toward, and marginally in Contact with the first plate, and means for securing the said plates and spacing bar together.

2. In a rotary fan, a circular rotatable body, having blades secured thereto each consisting of radiating plates, a cleat or bar extending longitudinally of the plate along one edge and at the butt end portion thereof, and tapering outwardly in its length, another plate extending along on the cleat and transversely inclined toward, and marginally in contact with the first plate, and means for securing the said plates and spacing bar together.

In a rotary fan, a circular rotatable body, and blades secured thereto, each consisting of a radiating plate, having cross sectionally angular portions, a cleat or spacing bar extending longitudinally of the plate along one edge and at the butt end portion thereof, another cross sectionally angularV plate extending along the cleat and transversely inclined toward, and marginally in contact on and secured to the first plate. one or'both of said plates being longitudinally corrugated, and means for securing the said plates and spacing bar together.

with the first plate, securing rivets passing through the said plates andy cleat, rivets fastening the marginal portion of the secondl plate tothe firstv plate, and a fastening connecting the outer end of the second plate tov the first plate. Y

5. In a rotar-y fan, a circular rotative body, and outwardly extending blades secured thereto, each consisting of av radiating plate having a comparatively narrow edge portion oblique to the majorl portion of the Width of the plate, a cleat or spacing'bar extending longitudinally of the plate along the edge and at the butt end portion thereof, and having its inneredge'portion obliquely turned, another plate transversely obliquely shaped to conform to the cleat and laterally extended incliningly toward, and having its marginal portion in contact on, the face of the first-plate, and means for fastening the edge portionV of the plates and spacing bar together, and fastenings connecting the marginal portion of the second named plate with the first plate.

6. Ina rotary fan, a circular rotative body and outwardly extending lblades secured thereto, each vconsisting of a radiating plate having a comparatively narrow edge portion oblique to the major portion of the width of the plate, anendwise tapering cleat or spacing bar extending longitudinally of the plate along the edge and at the buttend portion thereof, and havin-g its inner edge portionv obliquely turned and cross sectionally tapered, anothe'rplate longer than the cleat, transversely obliquely shaped to conform to theA cleat transversely extended inclininglv toward and having its marginal portion in contact on and secured to the first plate, and having its outer end portion merging to contact on the first plate and secured thereto, and means for fastening the edge portion of the' plates and cleat together.

7. In a rotary fan, a hub, a series of centrally apertured cup-shaped thin metal plates of successively increasing diameters having the plane annular portions of the relatively outer ones facewise overlapped on and secured 'to the plane annular portion of the one next the'rewithin` to form a circular built up and reinforced fan body, means for securing vsuch body on the hub, and radiating blades aliixed to said body.

Si.V In a rotary fan, a plurality of centrally apertured thin metal disks or annuli of successively increasing diameters, in face- Wise adj oined relations, and rivets fastening them together, and said dierent sized disks having angularly turned marginal flanges, concentric one with another, and radiating blades afiixed on the plane faced side of the united disks.

9. In a rotary fan, a plurality of centrally apertured thin metal disks or annuli of successively increasing diameters, in facewise adjoined relations, all having the central apertures therein of same diameter, and rivets fastening them together, to forni a fan body, said different sized disks having angularly turned marginal flanges, arranged concentrically one Within another, and radiating blades affixed on the plane faced side of the united disks, a central hub,about which the centrally apertured body, formed by the adjoined disks, its,-having a shoulder forming lange against Which such body bears, and securing bolts passing through the body and said flange.

l0. In a rotary fan, in combination, a plurality of centrally apertured thin metal disks or annuli of successively increasing diameters, n facevvise adjoined relations, all having the central apertures therein of the same diameter, to form a fan body, said different sized metallic disks having angularly turned marginal ilanges, arranged concentrically one Within another, and radiating blades arranged on the plane faced side of the adjoined disks, each comprising a cornparatively long plate, a spacing bar on the butt end portion of such plate and another plate, spaced by said bar and transversely extended to Contact on and secured to the first plate, rivets passing through and uniting said plates, the interposed bar, and said disks, a central hub,-about which the centrally apertured disk formed body fits,-hav ing a shoulder forming flange against Which such body bears, and securing bolts passing through the body and said flange.

Signed by ine at New York city, N. Y., in presence of tWo subscribing Witnesses.

ERNST GLANTZBERG. Witnesses: Y

FRANK MAST, F. A. DEESEN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

